Display device including alignment mark and light shielding pattern

Abstract

Disclosed is a display device that includes a substrate having an active area and a dead area around the active area; an alignment mark on the inside surface of the substrate in a part of the dead area; and a light-shielding pattern on a rear surface of the substrate in the dead area, the light-shielding pattern including a mark hole for exposing the alignment mark. By providing the light-shielding pattern on a display surface in the dead area, the display device has expanded active display area and improved visual appreciation.

What is claimed is: 
     
       1. A display device comprising:
 a substrate having an active area and a dead area around the active area, the substrate having a pixel array on an inside surface of the substrate in the active area; 
 an alignment mark on the inside surface of the substrate in a part of the dead area; and 
 a light-shielding pattern on a rear surface of the substrate, which is opposite to the inside surface and from which an image formed by the pixel array on the inside surface is transmitted to a viewer, exclusively in the dead area, the light-shielding pattern including a mark hole for exposing the alignment mark. 
 
     
     
       2. The display device according to  claim 1 , further comprising a polarizer on the rear surface of the substrate, the polarizer covering the light-shielding pattern. 
     
     
       3. The display device according to  claim 2 , wherein the light-shielding pattern is spaced apart from an edge of the substrate. 
     
     
       4. The display device according to  claim 3 , wherein the light-shielding pattern is spaced apart from the edge of the substrate by a distance of 200 μm to 300 μm. 
     
     
       5. The display device according to  claim 2 , wherein the light-shielding pattern has a dot shape at a boundary of the active area and the dead area. 
     
     
       6. The display device according to  claim 2 , wherein the light-shielding pattern is formed in a diagonal line direction having an acute angle with respect to an adhesion direction of the polarizer. 
     
     
       7. The display device according to  claim 2 , wherein the alignment mark is spaced apart from an edge of the mark hole by a predetermined distance. 
     
     
       8. The display device according to  claim 1 , further comprising a dummy pixel unit in the dead area adjacent to an edge of the pixel array on the inside surface of the substrate. 
     
     
       9. The display device according to  claim 8 , wherein the light-shielding pattern overlaps a part of the dummy pixel unit. 
     
     
       10. The display device according to  claim 1 , wherein the pixel array comprises a thin film transistor array and an organic light emitting diode array. 
     
     
       11. The display device according to  claim 10 , wherein the alignment mark is disposed in a layer of the thin film transistor array. 
     
     
       12. The display device according to  claim 1 , further comprising:
 a protective film covering the pixel array disposed on the inside surface of the substrate; 
 an adhesive layer covering an upper surface and a side surface of the protective film, the adhesive layer disposed on the inside surface of the substrate; and 
 a sealing substrate adhered to an upper surface of the adhesive layer. 
 
     
     
       13. The display device according to  claim 12 , wherein the sealing substrate comprises a metal. 
     
     
       14. The display device according to  claim 13 , wherein the mark hole is spaced apart from an edge of the sealing substrate and the sealing substrate overlaps the light-shielding pattern in a region not corresponding to the mark hole. 
     
     
       15. The display device according to  claim 1 , wherein the rear surface of the substrate is a display surface to the viewer.